Fake rail crossings mark the site of an influential doctor's demise.

A massive volcanic plug is now a protected area that hosts a number of bird species.

Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

One of the first skyscrapers in Santa Monica, and a famous getaway for the Hollywood elite of then and now.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

This golf ball–shaped former desert real estate office now houses a UFO museum.

A curious friendship between two inanimate ladies.

I fought the law and the precinct caved in.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

Final resting place of the immigrant who brought artificial seltzer water to America.

A mass grave for victims of one of the city’s worst fires.

A way to take your secrets to someone else's grave.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Try not to get slimed in Tribeca.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

A multi-storied adobe complex has been inhabited for more than a thousand years.

These aggressively sustainable art homes look like something out of 1970's science fiction.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

A unique geological area spiked with wind-carved rocks that resemble teepees.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.